This isn’t the only anti-meat stunt that PCRM bases on animal-derived results: PCRM has sued McDonalds and other restaurant chains over the presence of chemicals called heterocyclic amines (HCAs) in grilled chicken. Sure enough, the National Cancer Institute reports, “Studies have shown that exposure to HCAs … can cause cancer in animal models.” (The NCI also helpfully notes, “Population studies have not established a definitive link between HCA … exposure from cooked meats and cancer in humans.”)